GB1400427A - Video signal processing apparatus - Google Patents

Video signal processing apparatus

Info

Publication number
GB1400427A
GB1400427A GB5185171A GB5185171A GB1400427A GB 1400427 A GB1400427 A GB 1400427A GB 5185171 A GB5185171 A GB 5185171A GB 5185171 A GB5185171 A GB 5185171A GB 1400427 A GB1400427 A GB 1400427A
Authority
GB
United Kingdom
Prior art keywords
transistor
resistor
brightness
nov
cut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5185171A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RCA Corp filed Critical RCA Corp
Priority to GB5185171A priority Critical patent/GB1400427A/en
Priority to AU48183/72A priority patent/AU475508B2/en
Priority to US00303021A priority patent/US3804981A/en
Priority to CA155,554A priority patent/CA996253A/en
Priority to BE790995A priority patent/BE790995A/en
Priority to NLAANVRAGE7215031,A priority patent/NL182269C/en
Priority to SE7214395A priority patent/SE385645B/en
Priority to ES408321A priority patent/ES408321A1/en
Priority to FR7239373A priority patent/FR2159329B1/fr
Priority to IT31347/72A priority patent/IT970281B/en
Priority to AT950372A priority patent/AT351091B/en
Priority to DE2254619A priority patent/DE2254619C3/en
Priority to JP11196372A priority patent/JPS544572B2/ja
Priority to BR007828/72A priority patent/BR7207828D0/en
Publication of GB1400427A publication Critical patent/GB1400427A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H04N5/59—Control of contrast or brightness in dependence upon beam current of cathode ray tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Picture Signal Circuits (AREA)
  • Color Television Systems (AREA)
  • Details Of Television Scanning (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

1400427 Television RCA CORPORATION 2 Nov 1972 [8 Nov 1971] 51851/71 Heading H4F A luminance signal amplifier having an input 1 and output 11 includes a variable brightness control 42 which controls the D.C. current flowing through transistor 80 and hence the D.C. voltage generated across resistor 72 and so the brightness of the displayed output signal. Contrast is controlled via resistor 38 and transistor 66. Blanking signals are applied to terminal 10 to turn transistors 90, 98 on and hence turn transistor 64 off. A resistor 112 is provided so that operation of the contrast control 38 does not affect the brightness of the displayed signal. If the beam current of the reproducing cathoderay tube increases beyond a desired limit transistor 102 is cut off by beam current serving circuitry and transistor 106 cut on so as to reduce the current flow through resistor 72 and so limit the reproduced brightness.
GB5185171A 1971-11-08 1971-11-08 Video signal processing apparatus Expired GB1400427A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
GB5185171A GB1400427A (en) 1971-11-08 1971-11-08 Video signal processing apparatus
AU48183/72A AU475508B2 (en) 1971-11-08 1972-10-26 Image brightness control apparatus
US00303021A US3804981A (en) 1971-11-08 1972-11-02 Brightness control
CA155,554A CA996253A (en) 1971-11-08 1972-11-03 Second generation monolithic integration of color television receivers
BE790995A BE790995A (en) 1971-11-08 1972-11-06 Second Generation Monolithically Integrated Color Television Receivers
NLAANVRAGE7215031,A NL182269C (en) 1971-11-08 1972-11-07 VIDEO SIGNAL STAGE WITH IMAGE BRIGHTNESS ADJUSTER.
SE7214395A SE385645B (en) 1971-11-08 1972-11-07 DEVICE FOR PROCESSING VIDEO SIGNALS
ES408321A ES408321A1 (en) 1971-11-08 1972-11-07 Brightness control
FR7239373A FR2159329B1 (en) 1971-11-08 1972-11-07
IT31347/72A IT970281B (en) 1971-11-08 1972-11-07 EQUIPMENT FOR THE PROCESSING OF VIDEO SIGNALS IN COLOR TELEVISION RECEIVERS WITH MONOLITHIC INTEGRATION OF THE SECOND GENERATION
AT950372A AT351091B (en) 1971-11-08 1972-11-08 CIRCUIT ARRANGEMENT FOR THE LUMINANCING CHANNEL OF A COLOR TV RECEIVER
DE2254619A DE2254619C3 (en) 1971-11-08 1972-11-08 Circuit arrangement for handling video signals
JP11196372A JPS544572B2 (en) 1971-11-08 1972-11-08
BR007828/72A BR7207828D0 (en) 1971-11-08 1972-11-08 APPLIANCE FOR PROCESSING VIDEO SIGNALS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5185171A GB1400427A (en) 1971-11-08 1971-11-08 Video signal processing apparatus

Publications (1)

Publication Number Publication Date
GB1400427A true GB1400427A (en) 1975-07-16

Family

ID=10461633

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5185171A Expired GB1400427A (en) 1971-11-08 1971-11-08 Video signal processing apparatus

Country Status (14)

Country Link
US (1) US3804981A (en)
JP (1) JPS544572B2 (en)
AT (1) AT351091B (en)
AU (1) AU475508B2 (en)
BE (1) BE790995A (en)
BR (1) BR7207828D0 (en)
CA (1) CA996253A (en)
DE (1) DE2254619C3 (en)
ES (1) ES408321A1 (en)
FR (1) FR2159329B1 (en)
GB (1) GB1400427A (en)
IT (1) IT970281B (en)
NL (1) NL182269C (en)
SE (1) SE385645B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124448A (en) * 1982-07-15 1984-02-15 Rca Corp Gain adjustment of display driver amplifier in a video signal processing system

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5537146B2 (en) * 1972-08-28 1980-09-26
JPS5230821Y2 (en) * 1973-02-28 1977-07-14
US3987242A (en) * 1974-04-24 1976-10-19 American Optical Corporation Automatic dc restorer and gain control
JPS5210621A (en) * 1975-06-18 1977-01-27 Matsushita Electric Ind Co Ltd Color tv receiving set
US4067048A (en) * 1976-08-19 1978-01-03 Rca Corporation Automatic beam current limiter
US4044375A (en) * 1976-08-19 1977-08-23 Rca Corporation Brightness control apparatus
US4081838A (en) * 1977-01-19 1978-03-28 Gte Sylvania Incorporated Contrast control circuitry for a video processing system
JPS53124915A (en) * 1977-04-07 1978-10-31 Sony Corp Control circuit
US4137552A (en) * 1977-05-05 1979-01-30 Rca Corporation Automatic beam current limiter with independently determined threshold level and dynamic control range
US4135200A (en) * 1977-05-12 1979-01-16 Rca Corporation Brightness control circuit with predictable brightness control range
US4257064A (en) * 1980-02-19 1981-03-17 Hughes Aircraft Company Wideband linear video contrast control
US4376288A (en) * 1981-08-27 1983-03-08 Rca Corporation Signal gain control with DC compensation
US4506292A (en) * 1982-06-14 1985-03-19 Motorola, Inc. Video driver circuit and method for automatic gray scale adjustment and elimination of contrast tracking errors
WO1984000091A1 (en) * 1982-06-14 1984-01-05 Motorola Inc Video driver circuit and method for automatic gray scale adjustment and elimination of contrast tracking errors
US4644231A (en) * 1984-11-29 1987-02-17 Rca Corporation Video data display driver stage
US4663667A (en) * 1985-11-25 1987-05-05 Polaroid Corporation Contrast control circuit
US4855864A (en) * 1988-07-22 1989-08-08 Zenith Electronics Corporation High voltage shutdown circuit with brightness tracking
US5134490A (en) * 1989-04-18 1992-07-28 Thomson Consumer Electronics, Inc. Beam current limiter with brightness control threshold extension
US4947253A (en) * 1989-04-18 1990-08-07 Rca Licensing Corporation Brightness modulator for closed loop compensation of black level
JPH0315210A (en) * 1989-06-13 1991-01-23 Asahi Tec Corp Uplift roller mounting device and plate for the roller
US5021885A (en) * 1989-07-07 1991-06-04 Samsung Electronics Co., Ltd. Automatic brightness limiter
US4982287A (en) * 1989-11-01 1991-01-01 Rca Licensing Corporation Control of brightness level adapted to control of contrast
JP2784839B2 (en) * 1990-07-17 1998-08-06 松下電器産業株式会社 Image signal gradation correction device
US5847773A (en) * 1991-08-30 1998-12-08 Thomson Consumer Electronics, Inc. Video system including apparatus for deactivating an automatic control arrangement
US5245434A (en) * 1992-05-22 1993-09-14 Thomson Consumer Electronics, Inc. Autopix circuit with inserted vertical blanking

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1243234B (en) * 1965-03-25 1967-06-29 Loewe Opta Gmbh Transistor circuit arrangement for color television receivers for controlling the brightness of the color picture tubes
US3465095A (en) * 1967-04-26 1969-09-02 Motorola Inc Automatic beam intensity limiter
US3564137A (en) * 1968-01-26 1971-02-16 Motorola Inc Automatic brightness compensation circuit
US3579133A (en) * 1969-01-29 1971-05-18 Rca Corp Signal translating stage
US3597540A (en) * 1969-04-01 1971-08-03 Motorola Inc Automatic brightness control responsive to black level of video signal
US3600514A (en) * 1970-03-09 1971-08-17 Zenith Radio Corp Solid-state luminance channel for color television receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124448A (en) * 1982-07-15 1984-02-15 Rca Corp Gain adjustment of display driver amplifier in a video signal processing system

Also Published As

Publication number Publication date
DE2254619C3 (en) 1982-05-27
JPS544572B2 (en) 1979-03-08
JPS4858723A (en) 1973-08-17
BR7207828D0 (en) 1973-08-30
AU475508B2 (en) 1976-08-26
ES408321A1 (en) 1975-11-16
US3804981A (en) 1974-04-16
ATA950372A (en) 1978-12-15
IT970281B (en) 1974-04-10
FR2159329B1 (en) 1977-07-29
DE2254619A1 (en) 1973-05-10
SE385645B (en) 1976-07-12
NL7215031A (en) 1973-05-10
BE790995A (en) 1973-03-01
DE2254619B2 (en) 1975-10-23
NL182269B (en) 1987-09-01
AT351091B (en) 1979-07-10
AU4818372A (en) 1974-05-02
CA996253A (en) 1976-08-31
NL182269C (en) 1988-02-01
FR2159329A1 (en) 1973-06-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years